796 lines
16 KiB
C
796 lines
16 KiB
C
/*
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* Copyright (c) 2000 Jason Evans <jasone@freebsd.org>.
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* Copyright (c) 2002 Daniel M. Eischen <deischen@freebsd.org>
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* Copyright (c) 2003 Jeff Roberson <jeff@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice(s), this list of conditions and the following disclaimer as
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* the first lines of this file unmodified other than the possible
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* addition of one or more copyright notices.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice(s), this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by John Birrell.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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#include <sys/fcntl.h>
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#include <sys/mman.h>
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#include <sys/param.h>
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#include <sys/select.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <sys/wait.h>
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#include <aio.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <pthread.h>
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#include <semaphore.h>
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#include <signal.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include "thr_private.h"
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extern spinlock_t *__malloc_lock;
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extern int __creat(const char *, mode_t);
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extern int __sleep(unsigned int);
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extern int __sys_nanosleep(const struct timespec *, struct timespec *);
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extern int __sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
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extern int __sys_sigaction(int, const struct sigaction *, struct sigaction *);
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extern int __system(const char *);
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extern int __tcdrain(int);
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extern pid_t __wait(int *);
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extern pid_t __sys_wait4(pid_t, int *, int, struct rusage *);
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extern pid_t __waitpid(pid_t, int *, int);
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__weak_reference(_accept, accept);
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int
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_accept(int s, struct sockaddr *addr, socklen_t *addrlen)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_accept(s, addr, addrlen);
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_thread_leave_cancellation_point();
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return (ret);
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}
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__weak_reference(_aio_suspend, aio_suspend);
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int
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_aio_suspend(const struct aiocb * const iocbs[], int niocb, const struct
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timespec *timeout)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_aio_suspend(iocbs, niocb, timeout);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_close, close);
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int
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_close(int fd)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_close(fd);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_connect, connect);
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int
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_connect(int s, const struct sockaddr *n, socklen_t l)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_connect(s, n, l);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_creat, creat);
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int
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_creat(const char *path, mode_t mode)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __creat(path, mode);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_fcntl, fcntl);
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int
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_fcntl(int fd, int cmd,...)
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{
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int ret;
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va_list ap;
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_thread_enter_cancellation_point();
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va_start(ap, cmd);
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switch (cmd) {
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case F_DUPFD:
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case F_SETFD:
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case F_SETFL:
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ret = __sys_fcntl(fd, cmd, va_arg(ap, int));
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break;
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case F_GETFD:
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case F_GETFL:
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ret = __sys_fcntl(fd, cmd);
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break;
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default:
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ret = __sys_fcntl(fd, cmd, va_arg(ap, void *));
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}
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va_end(ap);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_fork, fork);
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int
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_fork(int fd)
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{
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int ret;
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struct pthread_atfork *af;
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_pthread_mutex_lock(&_atfork_mutex);
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/* Run down atfork prepare handlers. */
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TAILQ_FOREACH_REVERSE(af, &_atfork_list, atfork_head, qe) {
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if (af->prepare != NULL)
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af->prepare();
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}
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/*
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* Fork a new process.
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* XXX - The correct way to handle __malloc_lock is to have
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* the threads libraries (or libc) install fork handlers for it
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* in their initialization routine. We should probably
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* do that for all the locks in libc.
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*/
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if (__isthreaded && __malloc_lock != NULL)
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_SPINLOCK(__malloc_lock);
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ret = __sys_fork();
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if (ret == 0) {
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__isthreaded = 0;
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if (__malloc_lock != NULL)
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memset(__malloc_lock, 0, sizeof(spinlock_t));
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init_tdlist(curthread, 1);
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init_td_common(curthread, NULL, 1);
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_mutex_reinit(&_atfork_mutex);
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/* Run down atfork child handlers. */
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TAILQ_FOREACH(af, &_atfork_list, qe) {
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if (af->child != NULL)
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af->child();
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}
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} else if (ret != -1) {
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/* Run down atfork parent handlers. */
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TAILQ_FOREACH(af, &_atfork_list, qe) {
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if (af->parent != NULL)
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af->parent();
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}
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}
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if (ret != 0) {
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if (__isthreaded && __malloc_lock != NULL)
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_SPINUNLOCK(__malloc_lock);
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_pthread_mutex_unlock(&_atfork_mutex);
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}
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return ret;
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}
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__weak_reference(_fsync, fsync);
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int
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_fsync(int fd)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_fsync(fd);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_msgrcv, msgrcv);
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int
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_msgrcv(int id, void *p, size_t sz, long t, int f)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_msgrcv(id, p, sz, t, f);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_msgsnd, msgsnd);
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int
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_msgsnd(int id, const void *p, size_t sz, int f)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_msgsnd(id, p, sz, f);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_msync, msync);
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int
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_msync(void *addr, size_t len, int flags)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_msync(addr, len, flags);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_nanosleep, nanosleep);
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int
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_nanosleep(const struct timespec * time_to_sleep, struct timespec *
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time_remaining)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_nanosleep(time_to_sleep, time_remaining);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_open, open);
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int
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_open(const char *path, int flags,...)
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{
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int ret;
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int mode = 0;
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va_list ap;
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_thread_enter_cancellation_point();
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/* Check if the file is being created: */
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if (flags & O_CREAT) {
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/* Get the creation mode: */
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va_start(ap, flags);
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mode = va_arg(ap, int);
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va_end(ap);
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}
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ret = __sys_open(path, flags, mode);
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_thread_leave_cancellation_point();
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return ret;
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}
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/*
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* The implementation in libc calls sigpause(), which is also
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* a cancellation point.
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*/
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#if 0
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__weak_reference(_pause, pause);
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int
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_pause(void)
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{
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_thread_enter_cancellation_point();
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__pause();
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_thread_leave_cancellation_point();
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}
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#endif
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__weak_reference(_poll, poll);
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int
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_poll(struct pollfd *fds, unsigned int nfds, int timeout)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_poll(fds, nfds, timeout);
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_thread_leave_cancellation_point();
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return ret;
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}
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/* XXXFix */
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#if 0
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__weak_reference(_pread, pread);
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ssize_t
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_pread(int d, void *b, size_t n, off_t o)
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{
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ssize_t ret;
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_thread_enter_cancellation_point();
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ret = __sys_pread(d, b, n, o);
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_thread_leave_cancellation_point();
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return (ret);
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}
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#endif
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/* The libc version calls select(), which is also a cancellation point. */
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#if 0
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extern int __pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds,
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const struct timespec *timo, const sigset_t *mask);
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int
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pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds,
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const struct timespec *timo, const sigset_t *mask)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __pselect(count, rfds, wfds, efds, timo, mask);
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_thread_leave_cancellation_point();
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return (ret);
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}
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#endif
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/* XXXFix */
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#if 0
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__weak_reference(_pwrite, pwrite);
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ssize_t
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_pwrite(int d, const void *b, size_t n, off_t o)
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{
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ssize_t ret;
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_thread_enter_cancellation_point();
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ret = __sys_pwrite(d, b, n, o);
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_thread_leave_cancellation_point();
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return (ret);
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}
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#endif
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__weak_reference(_raise, raise);
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int
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_raise(int sig)
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{
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int error;
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error = pthread_kill(pthread_self(), sig);
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if (error != 0) {
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errno = error;
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error = -1;
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}
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return (error);
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}
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__weak_reference(_read, read);
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ssize_t
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_read(int fd, void *buf, size_t nbytes)
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{
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ssize_t ret;
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_thread_enter_cancellation_point();
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ret = __sys_read(fd, buf, nbytes);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_readv, readv);
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ssize_t
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_readv(int fd, const struct iovec *iov, int iovcnt)
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{
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ssize_t ret;
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_thread_enter_cancellation_point();
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ret = __sys_readv(fd, iov, iovcnt);
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_thread_leave_cancellation_point();
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return ret;
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}
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/*
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* The libc implementation of recv() calls recvfrom, which
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* is also a cancellation point.
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*/
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#if 0
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__weak_reference(_recv, recv);
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ssize_t
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_recv(int s, void *b, size_t l, int f)
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{
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ssize_t ret;
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_thread_enter_cancellation_point();
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ret = __sys_recv(s, b, l, f);
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_thread_leave_cancellation_point();
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return (ret);
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}
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#endif
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__weak_reference(_recvfrom, recvfrom);
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ssize_t
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_recvfrom(int s, void *b, size_t l, int f, struct sockaddr *from,
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socklen_t *fl)
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{
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ssize_t ret;
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_thread_enter_cancellation_point();
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ret = __sys_recvfrom(s, b, l, f, from, fl);
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_thread_leave_cancellation_point();
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return (ret);
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}
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__weak_reference(_recvmsg, recvmsg);
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ssize_t
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_recvmsg(int s, struct msghdr *m, int f)
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{
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ssize_t ret;
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_thread_enter_cancellation_point();
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ret = __sys_recvmsg(s, m, f);
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_thread_leave_cancellation_point();
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return (ret);
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}
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__weak_reference(_select, select);
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int
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_select(int numfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
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struct timeval *timeout)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_select(numfds, readfds, writefds, exceptfds, timeout);
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_thread_leave_cancellation_point();
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return ret;
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}
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/*
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* Libc implements this by calling _sendto(), which is also a
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* cancellation point.
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*/
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#if 0
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__weak_reference(_send, send);
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ssize_t
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_send(int s, const void *m, size_t l, int f)
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{
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ssize_t ret;
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_thread_enter_cancellation_point();
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ret = _sendto(s, m, l, f, NULL, 0);
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_thread_leave_cancellation_point();
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return (ret);
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}
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#endif
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__weak_reference(_sendmsg, sendmsg);
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ssize_t
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_sendmsg(int s, const struct msghdr *m, int f)
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{
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ssize_t ret;
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_thread_enter_cancellation_point();
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ret = __sys_sendmsg(s, m, f);
|
|
_thread_leave_cancellation_point();
|
|
return (ret);
|
|
}
|
|
|
|
__weak_reference(_sendto, sendto);
|
|
|
|
ssize_t
|
|
_sendto(int s, const void *m, size_t l, int f, const struct sockaddr *t,
|
|
socklen_t tl)
|
|
{
|
|
ssize_t ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = __sys_sendto(s, m, l, f, t, tl);
|
|
_thread_leave_cancellation_point();
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* The implementation in libc calls sigsuspend(), which is also
|
|
* a cancellation point.
|
|
*/
|
|
#if 0
|
|
__weak_reference(_sigpause, sigpause);
|
|
|
|
int
|
|
_sigpause(int m)
|
|
{
|
|
int ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = __sys_sigpause(m);
|
|
_thread_leave_cancellation_point();
|
|
return (ret);
|
|
}
|
|
#endif
|
|
|
|
__weak_reference(_sigsuspend, sigsuspend);
|
|
|
|
int
|
|
_sigsuspend(const sigset_t *m)
|
|
{
|
|
int ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = __sys_sigsuspend(m);
|
|
_thread_leave_cancellation_point();
|
|
return (ret);
|
|
}
|
|
|
|
__weak_reference(_sigtimedwait, sigtimedwait);
|
|
|
|
int
|
|
_sigtimedwait(const sigset_t *s, siginfo_t *i, const struct timespec *t)
|
|
{
|
|
int ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = __sys_sigtimedwait(s, i, t);
|
|
_thread_leave_cancellation_point();
|
|
return (ret);
|
|
}
|
|
|
|
__weak_reference(_sigwait, sigwait);
|
|
|
|
int
|
|
_sigwait(const sigset_t *s, int *i)
|
|
{
|
|
int ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = __sys_sigwait(s, i);
|
|
_thread_leave_cancellation_point();
|
|
return (ret);
|
|
}
|
|
|
|
__weak_reference(_sigwaitinfo, sigwaitinfo);
|
|
|
|
int
|
|
_sigwaitinfo(const sigset_t *s, siginfo_t *i)
|
|
{
|
|
int ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = __sys_sigwaitinfo(s, i);
|
|
_thread_leave_cancellation_point();
|
|
return (ret);
|
|
}
|
|
|
|
__weak_reference(_sleep, sleep);
|
|
|
|
unsigned int
|
|
_sleep(unsigned int seconds)
|
|
{
|
|
unsigned int ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = __sleep(seconds);
|
|
_thread_leave_cancellation_point();
|
|
|
|
return ret;
|
|
}
|
|
|
|
__weak_reference(_system, system);
|
|
|
|
int
|
|
_system(const char *string)
|
|
{
|
|
int ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = __system(string);
|
|
_thread_leave_cancellation_point();
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
__weak_reference(_tcdrain, tcdrain);
|
|
|
|
int
|
|
_tcdrain(int fd)
|
|
{
|
|
int ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = __tcdrain(fd);
|
|
_thread_leave_cancellation_point();
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* The usleep() implementation calls nanosleep(), which is also
|
|
* a cancellation point.
|
|
*/
|
|
#if 0
|
|
__weak_reference(_usleep, usleep);
|
|
|
|
int
|
|
_usleep(useconds_t u)
|
|
{
|
|
int ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = __sys_usleep(u);
|
|
_thread_leave_cancellation_point();
|
|
return (ret);
|
|
}
|
|
#endif
|
|
|
|
__weak_reference(_wait, wait);
|
|
|
|
pid_t
|
|
_wait(int *istat)
|
|
{
|
|
pid_t ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = __wait(istat);
|
|
_thread_leave_cancellation_point();
|
|
|
|
return ret;
|
|
}
|
|
|
|
__weak_reference(_wait4, wait4);
|
|
|
|
pid_t
|
|
_wait4(pid_t pid, int *istat, int options, struct rusage *rusage)
|
|
{
|
|
pid_t ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = __sys_wait4(pid, istat, options, rusage);
|
|
_thread_leave_cancellation_point();
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* The libc implementation of waitpid calls wait4().
|
|
*/
|
|
#if 0
|
|
__weak_reference(_waitpid, waitpid);
|
|
|
|
pid_t
|
|
_waitpid(pid_t wpid, int *status, int options)
|
|
{
|
|
pid_t ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = __waitpid(wpid, status, options);
|
|
_thread_leave_cancellation_point();
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
__weak_reference(_write, write);
|
|
|
|
ssize_t
|
|
_write(int fd, const void *buf, size_t nbytes)
|
|
{
|
|
ssize_t ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = __sys_write(fd, buf, nbytes);
|
|
_thread_leave_cancellation_point();
|
|
|
|
return ret;
|
|
}
|
|
|
|
__weak_reference(_writev, writev);
|
|
|
|
ssize_t
|
|
_writev(int fd, const struct iovec *iov, int iovcnt)
|
|
{
|
|
ssize_t ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = __sys_writev(fd, iov, iovcnt);
|
|
_thread_leave_cancellation_point();
|
|
|
|
return ret;
|
|
}
|